
public class CalculatorTest {

	public static void main(String[] args) {
		
		CalculatorInterface calc= new Calculator();
		
		System.out.println(calc.add(5.5, 4.5));
		
		System.out.println(calc.subtract(10.0, 3.4));
		
		System.out.println(calc.multiply(1.5, 2.0));
		
		System.out.println(calc.divide(20.0, 2.5));

	}

}
